Not really. Shatter-centric builds already have to deal with that duality.
At least if you generate illusions with your profession mechanic, you can reliably fuel your shatters, OR reliably keep your illusions active (to a reasonably balanced degree).
Right now, you can't really do either with 50% of the Mesmer weapons. And, again, this is a problem because Illusions serve multiple purposes, and can be made to work for any particular build and/or goal. They can be used offensively, or defensively, or cause burst damage, or cause damaging conditions, or cause controlling conditions.
I'm primarily getting at
clones mind you, not phantasms. Phantasms being on weapons, I'm cool with that. Clone-generating, imo, should be the profession mechanic.